Blue Chalksticks is a groundcover of a different color. Succulent powdery blue-grey stems and foliage spread along the ground to form a dense mound around 1½ ft. tall by 3 ft. wide. Senecio mandraliscae is ideally used in full sun among other succulents and drought tolerant plants. Great along walkways, small slopes, or spilling over the side of a raised bed or container. Blue Chalksticks, has longer leaves than the dwarf Senecio serpens.